Improvement in machines for tapping gas and water fittings



7S-heets-Sheet1.

L. W. STOCKWELL. MACHINES FOR TAPPING GAS AND WATER-FITTINGS.

No, 173,191, Patented Feb.8, 1876.

ALM w. am 1W1 X FMZ MM NPHETS, FNOWLITHOGRAPNER. WASHINGTON. D. C,

7 Sheets-Sheet z.

L.IW.VSTOCKWELL.

MACHINES FOR TAP PING'GAS AND WATER-FITTINGS. No.173,191.

Patented Feb-8, 1876.

NPETERQ. PNOTO-LITNOGRAPHER, WASMNGYON, D4 0. V

L. W.STOCKWELL. MACHINES FOR'TAPPING GAS AND WATER-FITTINGS.

7 Sheets-Sheet 4.

110,173,191. Patented Feb. 8, 1876.

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7 SheetsShe'et 5.

.L. W; STOCKWELL.

MACHINES FOR TAPPING GAS AND WATER-FITTINGS. NO.173,191. I Patented Feb.8, 1876.

Jaw/05 4M amlg/w m NPYETERS. PIQTO-LITHOGRAPHER. WASHINGTON. D. O,

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MACHINES FOR TAPPING GAS AND WATER-FITTINGS.

Y No. 173,191. Patented Feb. 8, 1 876.

FK JM v I N- PETERS. FHOTO-LITNOGRAPMER, WASHINGTON, D. a

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L. W" STOCKWELL. MACHINES FOR TAPPING GAS AND WATER-FITTINGS. v

.No.173,191,. f Patented Feb. a, 1 76."

lPETmPflOTO-UTHOGRAFHEI. WASHINGTON. B O. I

. are secured by nuts. I The hollow shafts mm revolve the spindles ttby'means of a feather, sov as to allow the JTTNITEDQSTATES-PATENT OrrrenLEVI STOOKWELL OF BAVENNA, OHIO.

IMPROVEMENTlN'MACHINES FOR TAPPlNG GAS AND WATER. FITTINGS.

Specification forming part of Letters Patent No. [73,191, dated February8, 1876; application filed July 31, 1875. 4

To all whom it may concern Beiit known that I, LEVI W. S'rooKwELL, ofRavenn'a, Portage county, Ohio, have invented certain Improvements inGas-Fitting Machines, of which the following is a specification: e

The object of this invention is to tap gasfittings by operating severaltaps at the same time-on a fitting, the fittings being held in p0 sitionby a series of chucks ona carrier having a reciprocating movement.

The seven sheets of drawings hereto an- I nexed form a part of thisspecification.

Figure. 1 is a front view of the machine. Fig. 2 is a back view of partsof the machine.

Fig. 3 is a view of the right-hand side of the carrier-frame. Fig. 4 isa horizontal sectional view of the machine. Fig. 5 is a right-handsectional view of the carrier at the dotted line 1 in Fig. 1. Fig. 6 isaview of the left-hand 'side of the carrier-frame. Fig. 7 is a back viewof the sliding rod 3 and parts connected I with it. Figs. 8 and 9 areviews of the right- The pulleys d d are connected byvbelts with thepulleys f f, which are loose on the shaft g. One of the connecting-beltsis a cross-belt.

The clutch c slides on a feather on the shaft 9, and is alternatelythrown in clutch with the pulley f and the pulley f By means of one ofthe belts being crossed the motion of shaft 9 is reversed by throwingone of the pulleys f f out of clutch and the other in clutch. The pinionh on shaft 9 drives thefwheel k and pinions'e e onthe shaft 1. Thepinions e c drive the wheels p10 which are loose on the hollow shafts mand m Fig. 4, but may be attached to the wheels n and it on the shafts mand m, by moving the pins 2' i (which are in slots in the wheels 1) 11into notches in the circumference of the wheels at a, where they Asshown in the drawings, the wheel 1) is connected, by its pin a), withthe wheel a, and

the wheel 11 turns loose on its shaft; but when;

it is desired to cut left-hand threads wheel 12 is connected with wheelat, and wheel 19 is allowed to turn on its shaft. Both right and lefthand threads may be cut at the same time by connecting wheels 1) and n,and also 19 and a and removing one of the wheels The shaft of wheel r ishollow,'-and revolves a spindle in the same manner as the shafts m g m,and is used in tapping T-fittings. It is at right angles to the shafts mm, which are in line with each other. In the outer ends of the spindlesthe screws a are fastened by a setscrew. These screws a a a? are in linewith the spindles, and turn in stationary threaded nuts a held in theframe by set-screws, which causesthe taps in the other ends of thespin-' dies to enter and withdraw from the fittings.

I The pulleys f f are alternately thrown in,

clutch bymeans of the lever 4, pivoted at its lower end to the frame,and at its upper end to the sliding rod M. A pin in the lever y, nearits center, enters a groovein the circumference of the clutch c, bymeans of which the clutch is moved on its shaft.

The upper end of the arm of the rockshaft to is pivoted'to a slidingcollar on the rod 11 This rock-shaft is moved by-the' lever y, which ispivoted at its lower end to a short arm of the rock-shaft w, and at itsupper end to the frame. A pin in the lever 1 near its center, enters agroove around the spindle t Around the rod 11 on each side of thesliding collar, to which the arm y is pivoted, are spiral springs a at.These springs are adjustable by means of collars fastened to the rod 3by setscrews, and to these collars are attached the adjustable stops 0 0The rod 3 passes through, and is supported by, projections on the frame.The plate 0 Fig. 2, is attached to the rod 51 and has two notches in itsupper edge for the spring-stop c to enter. This stop is attached to theframe. The spring-stop c presses down in each of these two notches a1-ternately, as the sliding rod 3 is moved, to throw'the pulleys f f inclutch. The two adjacent sides of the notches are'sloping,'so that thespring-stop 0 will prevent the rody from sliding, while the arm 3 by itsmovement,

compresses one of the spiral springs until the collar of the arm 3presses against one of the stops 0 0 and then the sloping side of thenotch lifts the spring'stop 0 out of the notch, and the force of thecompressed spiral spring slides the rod 51 which throws the clutch 0from one pulley to the other, and allows the spring-stop c to enter theother notch. The chuck-carrier 0 slides in its frame across the machinejest beneath the taps. A series of chucks, 0 to hold fittings, are.fastened in line lengthwise of the chuck-carrier.

As soon as the taps have threaded and withdrawn from a fitting, thechuck-carrier 6 slides forward in its frame far enough to bring anotherchuck in position for threading the fitting held by it. Thechuck-carrier is operated by means of the toothed wheel 0 on the shaftm, the rack 6 the rock-shaft H, with its arms k h the pawl m rack mpawls i and m, and bar (P. The rack e is pivoted to the arm b of therock-shaft h The pawl m is pivoted to the arm If. The rack m is fastenedto the carrier 6 on which it is adjustable. The wheel 6 gives areciprocating motion to the rack e and rock'shaft h, causing the pawl mto move the rack m and carrier 6 The weight b is attached to a cordwhich passes over a pulley in the frame beneath the taps-the other endof the cord being fastened to the forward end of carrier 0 The pawls iand m prevent the weight from drawing back the carrier and hold thecarrier firmly in position while the fitting is bein g threaded.

When the rock-shaft h moves backward, carrying the arm h and pawl m,-the arm presses against the pin 0 in the bar d*, Fig. 10, which slidesback the bar, and, by means of a slight cam on the bar, lifts theratchet mi out of the rack m so as to permit the carrier 0 to he movedforward. When the pawl m is sliding the carrier forward the arm hpresses against the pin 0 in the bar 01 and slides forward the bar so asto permit the pawl m to fall in the rack when the carrier has reachedthe proper position for the'fitting to be'tapped,

Fig. 6.

The arm'h is made self-adjustable on the rock-shaft k by being clampedto the wheel (1 on the rock-shaft by means of the plate 61 Fig. 12, andscrews passing through the slip over the teeth of the wheel until themo-' tion of the wheel is reversed, when itwill be connected, by theaction of its spring, with the wheel-teeth, so as to again move therack.

The spiral spring 0 on a sliding pin in the other, the pawl m begins toslide the chuck-- carrier forward, and the fitting is moved intoposition to be tapped in time for the approaching taps to enter it. Therack e and pawl m then remain stationary until the fitting is tapped andthe motion of the taps is reversed to withdraw, when the rack e and pawlare moved back, where they remain until again moved forward by a reverseof the motion of the taps.

The sliding bar I, Figsr'l' and 8, moves in ways on the right-hand sideof-the carrierframe. By sliding forward this bar the cam on it pressesagainst the pin o in the vertical stop Z and lifts the stop l causing itto enter a notch in the lower edge of the plate 0 when the sliding rod 3is moving, and thus stopping the rod y when the clutch a is equallydistant from each of the pulleys f f, and in clutch with neither ofthem. The machine then ceases to operate until the bar Z is moved backand the pin 11. forces the stop P out of the notch in plate 0 by thepressure of the cam of bar I. r

The purpose 7 and manner of thus stopping the motion of the taps are asfollows: When the last fitting on the carrier e is being moved forwardby the pawl m in position to be tapped, the pin 0 in the carrier pressesback the slide a on the bar 1 compressing the spiral spring on the barI. The bar is prevented from sliding by the cam on the bar comingincontact with the pin "v in the stop 1 which is prevented from sliding upby the under edge of the plate 0 These positions of the carrier 6 andslide '0 are indicated by the dotted lines in Fig. 4. The part of thestop Z which presses against the lower edge of plate 0 is shown in Fig.3.

While the fitting is being tapped the arm g is compressing the spring aand when the fitting is tapped, arm 3 presses against the stop 0 andforces the spring-stop '0 out of its notch, and the power of thecompressed spring a slides the rod 3 into the position shown in Fig. 2,causing the tapsto withdraw. While the rod 3 is sliding into thisposition the pressure of the cam of bar 1 is prevented from forcing thestop Z into the notch in the lower edge of plate 0 by the strut opivoted to the plate 0 While the taps are withdrawing from the fitting,the spring a is being compressed, and after the taps have left thefitting, and while continuing to withdraw, the arm 3 presses against thestop 0 sliding the rod 3 till the cam on the bar I forces the stop 1into the notch in thelower edgeof plate 0 When stop I is enteringthisnotch,

the bar Z slides forward by the action of the spring on the barwhich.has been compressed by the pin 0 on the carrier, forcing back theslide 02 By the sliding forward of bar 1 the arms 'w w on a rock-shaftpassing through the carrier-frame have been'moved forward by the pin asin the bar 1 These positions of the various parts described are shown inFigs. 9

- and 10. The arm $0 in moving forward lifts the pawl i and the pawl M,which rest on the ratchet, out of the rack m and now the weight b drawsback the carrier 0 to the position shown in Fig. 8, when the pin 8 inthe carrier, pressing against the pin 8 in the bar 1 forces back the barto its original position, shown by the dotted lines. By this lastmovement of bar 1 the pin m moved back the arms w W, causing the pawl iand pawl m to drop into rack m at the same time the cam on bar 1 loweredthe stop I out of the notch in plate 0 and the compressed spring ormoved the rod 3 putting the pulley f' in clutch and causing thetaps toapproach the fitting at the-forward end of thecarrier. I

If desired, the weight b and cord may be removed, and then after thetaps are withdrawn from the last fitting on the carrier, the taps willcease to move until the carrier is moved back by hand.

The tapped fittings may be removed and the chucks refilled with fittingswhile the machine is in operation.

I claim as my invention- 1. The chuck-carrier e, in combination with therack m pawl m arms k and'h rack 6 and wheel 6 .substantially as and forth purpose herein set forth. a I

2. The 'spindlet, in combination with the lever '1 sliding-rod 3 withits notchedplate 0 spring a, spiral springs a a, stops 0 c and the lever'2, substantially as and for the purpose hereinset forth.

and for the purpose herein set forth.

'4. The combination of the chuck-carriers, pawl m bar (1 and arm hsubstantially as and for the purpose herein set forth.

' 5. The rack 6 having the slip-cogs 8 .73, in'

combination with wheel a, substantially as and for the purpose hereinset forth.

6. The combination of thespring.v 0 rack 0 wheel 0 substantially as andfor the'purpose herein set forth.

7. The arm W, in combination with'the plate d wheel W, and rock-shaft ksubstantially as'and for the purpose herein set forth.

8. The combination of the-strut 0 plate 0 and stop 1 substantially asand for the purpose herein set forth.

9. The sliding bar 1 in combinationwith e and sliding bar 1 havingrespectively the pins sand 8 with stop Z and sliding bar 3 substantiallyas and fortlie purpose herein set forth. i

13. The combination of the spindle t, wheel 0 rack 0 and rock-shaft hpawl m rack m and chuck-carrier 0 substantially as and for the purposeherein set forth. v

14. The combination of the spindle t screw a nut a lever y, rock-shaftw, arm 3 springs a a, stops c 0 sliding rod g lever y, clutch 0, andpulleys f f substantially as and for a the purpose herein Set forth.

LEVI W. STOOKWELL.

Witnesses: I

BRADFORD HOWLAND, E. P. WILMOT.

